package com.yvpi.yvpicturebackend.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yvpi.yvpicturebackend.api.aliyunai.AliYunAiApi;
import com.yvpi.yvpicturebackend.api.aliyunai.model.CreateOutPaintingTaskRequest;
import com.yvpi.yvpicturebackend.api.aliyunai.model.CreateOutPaintingTaskResponse;
import com.yvpi.yvpicturebackend.exception.BusinessException;
import com.yvpi.yvpicturebackend.exception.ErrorCode;
import com.yvpi.yvpicturebackend.exception.ThrowUtils;
import com.yvpi.yvpicturebackend.manager.CosManager;
import com.yvpi.yvpicturebackend.manager.FileManager;
import com.yvpi.yvpicturebackend.manager.upload.FilePictureUpload;
import com.yvpi.yvpicturebackend.manager.upload.PictureUploadTemplate;
import com.yvpi.yvpicturebackend.manager.upload.UrlPictureUpload;
import com.yvpi.yvpicturebackend.mapper.PictureMapper;
import com.yvpi.yvpicturebackend.model.dto.file.UploadPictureResult;
import com.yvpi.yvpicturebackend.model.dto.picture.*;
import com.yvpi.yvpicturebackend.model.entity.Picture;
import com.yvpi.yvpicturebackend.model.entity.Space;
import com.yvpi.yvpicturebackend.model.entity.User;
import com.yvpi.yvpicturebackend.model.enums.PictureReviewStatusEnum;
import com.yvpi.yvpicturebackend.model.vo.picture.PictureVO;
import com.yvpi.yvpicturebackend.model.vo.user.UserVO;
import com.yvpi.yvpicturebackend.service.PictureService;
import com.yvpi.yvpicturebackend.service.SpaceService;
import com.yvpi.yvpicturebackend.service.UserService;
import com.yvpi.yvpicturebackend.utils.ColorSimilarUtils;
import com.yvpi.yvpicturebackend.utils.HexColorExpander;
import lombok.extern.slf4j.Slf4j;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.beans.BeanUtils;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.support.TransactionTemplate;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.awt.*;
import java.io.IOException;
import java.util.*;
import java.util.List;
import java.util.stream.Collectors;

/**
* @author aaa
* @description 针对表【picture(图片)】的数据库操作Service实现
* @createDate 2025-04-09 15:32:54
*/
@Service
@Slf4j
public class PictureServiceImpl extends ServiceImpl<PictureMapper, Picture>
    implements PictureService {
    @Resource
    private FilePictureUpload filePictureUpload;
    @Resource
    private UrlPictureUpload urlPictureUpload;
    @Resource
    private UserService userService;
    @Resource
    private CosManager cosManager;
    @Resource
    private SpaceService spaceService;
    @Resource
    private TransactionTemplate transactionTemplate;
    @Resource
    private AliYunAiApi aliYunAiApi;
    /**
     * 上传图片
     * @param inputSource
     * @param pictureUploadRequest
     * @param loginUser
     * @return
     */
    public PictureVO uploadPicture(Object inputSource,
                                   PictureUploadRequest pictureUploadRequest, User loginUser) {
       //校验参数
        ThrowUtils.throwIf(loginUser == null, ErrorCode.NO_AUTH_ERROR);
        //校验空间id是否存在
        Long spaceId = pictureUploadRequest.getSpaceId();
        if (spaceId != null){
            Space space = spaceService.getById(spaceId);
            ThrowUtils.throwIf(space == null,ErrorCode.NOT_FOUND_ERROR,"空间不存在");
            //校验是否有空间权限
            //仅该空间创建人可以上传图片
            if (!space.getUserId().equals(loginUser.getId())){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"没有空间权限");
            }
            //校验额度
            if (space.getTotalCount() >= space.getMaxCount()){
                throw new BusinessException(ErrorCode.OPERATION_ERROR,"空间条数不足");
            }
            if (space.getTotalSize() >= space.getMaxSize()){
                throw new BusinessException(ErrorCode.OPERATION_ERROR,"空间大小不足");
            }
        }

        if(inputSource == null){
            throw  new BusinessException(ErrorCode.PARAMS_ERROR,"图片为空");
        }
        // 用于判断是新增还是更新图片
        Long pictureId = null;
        if (pictureUploadRequest != null) {
            pictureId = pictureUploadRequest.getId();
        }
        // 如果是更新图片，需要校验图片是否存在
        if (pictureId != null) {
            Picture oldPicture = this.getById(pictureId);
            ThrowUtils.throwIf(oldPicture == null,ErrorCode.NOT_FOUND_ERROR,"图片不存在");
            //校验权限，普通用户只能修改自己上传的图片
            if (!oldPicture.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)){
                throw  new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
            //校验空间id是否一致
            //没传spaceId,复用原有的
            if (spaceId == null){
                if (oldPicture.getSpaceId() != null){
                    spaceId = oldPicture.getSpaceId();
                }
            }else{
                //传了spaceID,必须和原有的一致
                if (ObjUtil.notEqual(spaceId,oldPicture.getSpaceId())){
                    throw  new BusinessException(ErrorCode.PARAMS_ERROR,"空间id不一致");
                }
            }
        }
        // 上传图片，得到信息
        // 按照用户 id 划分目录=>按照空间划分目录
        String uploadPathPrefix;
        if (spaceId == null){
            uploadPathPrefix = String.format("public/%s", loginUser.getId());
        }else {
            uploadPathPrefix = String.format("space/%s", spaceId);
        }

        //根据inputSource类型区分上传方式
        PictureUploadTemplate pictureUploadTemplate = filePictureUpload;
        if(inputSource instanceof String){
            pictureUploadTemplate = urlPictureUpload;
        }
        UploadPictureResult uploadPictureResult = pictureUploadTemplate.uploadPicture(inputSource, uploadPathPrefix);
        // 构造要入库的图片信息
        Picture picture = new Picture();
        picture.setSpaceId(spaceId);//指定空间id
        picture.setUrl(uploadPictureResult.getUrl());
        picture.setThumbnailUrl(uploadPictureResult.getThumbnailUrl());
//        picture.setPicColor(uploadPictureResult.getPicColor());
        picture.setPicColor(HexColorExpander.expandHexColor(uploadPictureResult.getPicColor()));
        String picName = uploadPictureResult.getPicName();
        //支持外层传递图片名称
        if (pictureUploadRequest != null &&
                StrUtil.isNotBlank(pictureUploadRequest.getPicName())){
            picName = pictureUploadRequest.getPicName();
        }
        picture.setName(picName);
        picture.setPicSize(uploadPictureResult.getPicSize());
        picture.setPicWidth(uploadPictureResult.getPicWidth());
        picture.setPicHeight(uploadPictureResult.getPicHeight());
        picture.setPicScale(uploadPictureResult.getPicScale());
        picture.setPicFormat(uploadPictureResult.getPicFormat());
        picture.setUserId(loginUser.getId());
        //补充审核参数
        fillReviewParams(picture,loginUser);
        // 如果 pictureId 不为空，表示更新，否则是新增
        if (pictureId != null) {
            // 如果是更新，需要补充 id 和编辑时间
            picture.setId(pictureId);
            picture.setEditTime(new Date());
        }
        //开启事务
        // 开启事务
        Long finalSpaceId = spaceId;
        transactionTemplate.execute(status -> {
            boolean result = this.saveOrUpdate(picture);
            ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR, "图片上传失败");
            //更新空间使用额度
            if (finalSpaceId != null) {
                boolean update = spaceService.lambdaUpdate()
                        .eq(Space::getId, finalSpaceId)
                        .setSql("totalSize = totalSize + " + picture.getPicSize())
                        .setSql("totalCount = totalCount + 1")
                        .update();
                ThrowUtils.throwIf(!update, ErrorCode.OPERATION_ERROR, "额度更新失败");
            }
            return picture;
        });

        //如果是更新，清除旧图片文件
//        Picture oldPicture = this.getById(pictureId);
//        this.clearPictureFile(oldPicture);
        return PictureVO.objToVo(picture);
    }

    /**
     * 获取查询条件
     * @param pictureQueryRequest
     * @return
     */
    @Override
    public QueryWrapper<Picture> getQueryWrapper(PictureQueryRequest pictureQueryRequest) {
        QueryWrapper<Picture> queryWrapper = new QueryWrapper<>();
        if (pictureQueryRequest == null) {
            return queryWrapper;
        }
        // 从对象中取值
        Long id = pictureQueryRequest.getId();
        String name = pictureQueryRequest.getName();
        String introduction = pictureQueryRequest.getIntroduction();
        String category = pictureQueryRequest.getCategory();
        List<String> tags = pictureQueryRequest.getTags();
        Long picSize = pictureQueryRequest.getPicSize();
        Integer picWidth = pictureQueryRequest.getPicWidth();
        Integer picHeight = pictureQueryRequest.getPicHeight();
        Double picScale = pictureQueryRequest.getPicScale();
        String picFormat = pictureQueryRequest.getPicFormat();
        String searchText = pictureQueryRequest.getSearchText();
        Long userId = pictureQueryRequest.getUserId();
        String sortField = pictureQueryRequest.getSortField();
        String sortOrder = pictureQueryRequest.getSortOrder();
        Integer reviewStatus = pictureQueryRequest.getReviewStatus();
        String reviewMessage = pictureQueryRequest.getReviewMessage();
        Long reviewerId = pictureQueryRequest.getReviewerId();
        Long spaceId = pictureQueryRequest.getSpaceId();
        boolean nullSpaceId = pictureQueryRequest.isNullSpaceId();
        Date startEditTime = pictureQueryRequest.getStartEditTime();
        Date endEditTime = pictureQueryRequest.getEndEditTime();

        // 从多字段中搜索
        if (StrUtil.isNotBlank(searchText)) {
            // 需要拼接查询条件
            //and(name like "%" or introduction like "%")
            queryWrapper.and(qw -> qw.like("name", searchText)
                    .or()
                    .like("introduction", searchText)
            );
        }
        queryWrapper.eq(ObjUtil.isNotEmpty(id), "id", id);
        queryWrapper.eq(ObjUtil.isNotEmpty(userId), "userId", userId);
        queryWrapper.like(StrUtil.isNotBlank(name), "name", name);
        queryWrapper.like(StrUtil.isNotBlank(introduction), "introduction", introduction);
        queryWrapper.like(StrUtil.isNotBlank(picFormat), "picFormat", picFormat);
        queryWrapper.like(StrUtil.isNotBlank(reviewMessage), "reviewMessage", reviewMessage);
        queryWrapper.eq(StrUtil.isNotBlank(category), "category", category);
        queryWrapper.eq(ObjUtil.isNotEmpty(picWidth), "picWidth", picWidth);
        queryWrapper.eq(ObjUtil.isNotEmpty(picHeight), "picHeight", picHeight);
        queryWrapper.eq(ObjUtil.isNotEmpty(picSize), "picSize", picSize);
        queryWrapper.eq(ObjUtil.isNotEmpty(picScale), "picScale", picScale);
        queryWrapper.eq(ObjUtil.isNotEmpty(reviewStatus), "reviewStatus", reviewStatus);
        queryWrapper.eq(ObjUtil.isNotEmpty(reviewerId), "reviewerId", reviewerId);
        queryWrapper.eq(ObjUtil.isNotEmpty(spaceId), "spaceId", spaceId);
        queryWrapper.isNull(nullSpaceId, "spaceId");
        //>=
        queryWrapper.ge(ObjUtil.isNotEmpty(startEditTime), "editTime", startEditTime);
       //<
        queryWrapper.lt(ObjUtil.isNotEmpty(endEditTime), "editTime", endEditTime);


        // JSON 数组查询
        if (CollUtil.isNotEmpty(tags)) {
            //and(name like "%\" or introduction like "%")
            for (String tag : tags) {
                queryWrapper.like("tags", "\"" + tag + "\"");
            }
        }
        // 排序
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }

    /**
     * 获取图片封装类
     * @param picture
     * @param request
     * @return
     */
    public PictureVO getPictureVo(Picture picture, HttpServletRequest request) {
            // 对象转封装类
            PictureVO pictureVO = PictureVO.objToVo(picture);
            // 关联查询用户信息
            Long userId = picture.getUserId();
            if (userId != null && userId > 0) {
                User user = userService.getById(userId);
                UserVO userVO = userService.getUserVO(user);
                pictureVO.setUser(userVO);
            }
            return pictureVO;

    }
    /**
     * 分页获取图片封装
     */
    @Override
    public Page<PictureVO> getPictureVOPage(Page<Picture> picturePage, HttpServletRequest request) {
        List<Picture> pictureList = picturePage.getRecords();
        Page<PictureVO> pictureVOPage = new Page<>(picturePage.getCurrent(), picturePage.getSize(), picturePage.getTotal());
        if (CollUtil.isEmpty(pictureList)) {
            return pictureVOPage;
        }
        // 对象列表 => 封装对象列表
        List<PictureVO> pictureVOList = pictureList.stream().map(PictureVO::objToVo).collect(Collectors.toList());
        // 1. 关联查询用户信息
        Set<Long> userIdSet = pictureList.stream().map(Picture::getUserId).collect(Collectors.toSet());
        Map<Long, List<User>> userIdUserListMap = userService.listByIds(userIdSet).stream()
                .collect(Collectors.groupingBy(User::getId));
        // 2. 填充信息
        pictureVOList.forEach(pictureVO -> {
            Long userId = pictureVO.getUserId();
            User user = null;
            if (userIdUserListMap.containsKey(userId)) {
                user = userIdUserListMap.get(userId).get(0);
            }
            pictureVO.setUser(userService.getUserVO(user));
        });
        pictureVOPage.setRecords(pictureVOList);
        return pictureVOPage;
    }

    /**
     * 数据校验,用于更新和修改图片时的判断
     * @param picture
     */
    public void validPicture(Picture picture) {
        ThrowUtils.throwIf(picture == null,ErrorCode.PARAMS_ERROR);
        //从对象中取值
        Long id = picture.getId();
        String url = picture.getUrl();
        String introduction = picture.getIntroduction();
        //修改数据时id不能为空
        ThrowUtils.throwIf(id == null,ErrorCode.PARAMS_ERROR,"id不能为空");
        if(StrUtil.isNotBlank(url)){
            ThrowUtils.throwIf(url.length() > 1024,ErrorCode.PARAMS_ERROR,"url过长");
        }
        if(StrUtil.isNotBlank(introduction)){
            ThrowUtils.throwIf(introduction.length() > 800,ErrorCode.PARAMS_ERROR,"简介过长");
        }

    }

    /**
     * 图片审核
     * @param pictureReviewRequest
     * @param user
     */
    public void doPictureReview(PictureReviewRequest pictureReviewRequest, User user) {
        //校验参数
        Long id = pictureReviewRequest.getId();
        Integer reviewStatus = pictureReviewRequest.getReviewStatus();
        PictureReviewStatusEnum reviewStatusEnum =
                PictureReviewStatusEnum.getEnumByValue(reviewStatus);
        if(id == null || reviewStatusEnum == null || reviewStatusEnum.equals(PictureReviewStatusEnum.REVIEWING)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        //判断图片是否存在
        Picture oldPicture = this.getById(id);
        ThrowUtils.throwIf(oldPicture == null,ErrorCode.NOT_FOUND_ERROR);
        //校验审核状态是否重复
        if(oldPicture.getReviewStatus().equals(reviewStatus)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"请勿重复审核");
        }
        //数据库操作
        Picture updatePicture = new Picture();
        BeanUtils.copyProperties(pictureReviewRequest,updatePicture);
        updatePicture.setReviewerId(user.getId());
        updatePicture.setReviewTime(new Date());
        boolean result = this.updateById(updatePicture);
        ThrowUtils.throwIf(!result,ErrorCode.OPERATION_ERROR);

    }
    /**
     * 填充审核参数
     * @param picture
     * @param loginUser
     */
    public void fillReviewParams(Picture picture, User loginUser) {
        if (userService.isAdmin(loginUser)) {
            // 管理员自动过审
            picture.setReviewStatus(PictureReviewStatusEnum.PASS.getValue());
            picture.setReviewerId(loginUser.getId());
            picture.setReviewMessage("管理员自动过审");
            picture.setReviewTime(new Date());
        } else {
            // 非管理员，创建或编辑都要改为待审核
            picture.setReviewStatus(PictureReviewStatusEnum.REVIEWING.getValue());
        }
    }

    /**
     * 批量抓取和创建图片
     *
     * @param pictureUploadByBatchRequest
     * @param loginUser
     * @return 成功创建的图片数
     */
    @Override
    public Integer uploadPictureByBatch(PictureUploadByBatchRequest pictureUploadByBatchRequest, User loginUser) {
        String searchText = pictureUploadByBatchRequest.getSearchText();
        // 格式化数量
        Integer count = pictureUploadByBatchRequest.getCount();
        String namePrefix = pictureUploadByBatchRequest.getNamePrefix();
        if(StrUtil.isBlank(namePrefix)){
            //名称前缀默认为搜索词
            namePrefix = searchText;
        }
        ThrowUtils.throwIf(count > 30, ErrorCode.PARAMS_ERROR, "最多 30 条");
        // 要抓取的地址
        String fetchUrl = String.format("https://cn.bing.com/images/async?q=%s&mmasync=1", searchText);
        Document document;
        try {
            document = Jsoup.connect(fetchUrl).get();
        } catch (IOException e) {
            log.error("获取页面失败", e);
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "获取页面失败");
        }
        Element div = document.getElementsByClass("dgControl").first();
        if (ObjUtil.isNull(div)) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "获取元素失败");
        }
        Elements imgElementList = div.select("img.mimg");
        int uploadCount = 0;
        for (Element imgElement : imgElementList) {
            String fileUrl = imgElement.attr("src");
            if (StrUtil.isBlank(fileUrl)) {
                log.info("当前链接为空，已跳过: {}", fileUrl);
                continue;
            }
            // 处理图片上传地址，防止出现转义问题或和对象存储冲突的问题
            int questionMarkIndex = fileUrl.indexOf("?");
            if (questionMarkIndex > -1) {
                fileUrl = fileUrl.substring(0, questionMarkIndex);
            }
            // 上传图片
            PictureUploadRequest pictureUploadRequest = new PictureUploadRequest();
            pictureUploadRequest.setFileUrl(fileUrl);
            pictureUploadRequest.setPicName(namePrefix + (uploadCount + 1));
            try {
                PictureVO pictureVO = this.uploadPicture(fileUrl, pictureUploadRequest, loginUser);
                log.info("图片上传成功, id = {}", pictureVO.getId());
                uploadCount++;
            } catch (Exception e) {
                log.error("图片上传失败", e);
                continue;
            }
            if (uploadCount >= count) {
                break;
            }
        }
        return uploadCount;
    }

    /**
     * 清理图片文件
     * @param oldPicture
     */
    @Async //异步执行
    @Override
    public void clearPictureFile(Picture oldPicture) {
        // 判断该图片是否被多条记录使用，用于秒传场景
        String pictureUrl = oldPicture.getUrl();
        long count = this.lambdaQuery()
                .eq(Picture::getUrl, pictureUrl)
                .count();
        // 有不止一条记录用到了该图片，不清理
        if (count > 1) {
            return;
        }
        // FIXME 注意，这里的 url 包含了域名，实际上只要传 key 值（存储路径）就够了
        cosManager.deleteObject(oldPicture.getUrl());
        // 清理缩略图
        String thumbnailUrl = oldPicture.getThumbnailUrl();
        if (StrUtil.isNotBlank(thumbnailUrl)) {
            cosManager.deleteObject(thumbnailUrl);
        }
    }

    /**
     * 校验空间图片的权限
     * @param picture
     * @param loginUser
     */
    public void checkPictureAuth(Picture picture, User loginUser) {
        Long spaceId = picture.getSpaceId();
        if (spaceId == null){
            //公共图片，仅本人或管理员操作
            if (!picture.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
        }else {
            //私有空间，仅创建空间的人可以操作
            if (!loginUser.getId().equals(picture.getUserId())){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
            }
        }
    }
    /**
     * 删除图片
     * @param pictureId
     * @param loginUser
     */
    public void deletePicture(long pictureId, User loginUser) {
        ThrowUtils.throwIf(pictureId <= 0, ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null, ErrorCode.NO_AUTH_ERROR);
        // 判断是否存在
        Picture oldPicture = this.getById(pictureId);
        ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
        // 校验权限
//        checkPictureAuth(oldPicture,loginUser);

        // 开启事务
        transactionTemplate.execute(status -> {
            // 操作数据库
            boolean result = this.removeById(pictureId);
            ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
            // 释放额度
            Long spaceId = oldPicture.getSpaceId();
            if (spaceId != null) {
                boolean update = spaceService.lambdaUpdate()
                        .eq(Space::getId, spaceId)
                        .setSql("totalSize = totalSize - " + oldPicture.getPicSize())
                        .setSql("totalCount = totalCount - 1")
                        .update();
                ThrowUtils.throwIf(!update, ErrorCode.OPERATION_ERROR, "额度更新失败");
            }
            return true;
        });
        // 异步清理文件
        this.clearPictureFile(oldPicture);
    }
    /**
     * 编辑图片（普通用户）
     * @param pictureEditRequest
     * @param loginUser
     */
    public void editPicture(PictureEditRequest pictureEditRequest, User loginUser) {
        // 在此处将实体类和 DTO 进行转换
        Picture picture = new Picture();
        BeanUtils.copyProperties(pictureEditRequest, picture);
        // 注意将 list 转为 string
        picture.setTags(JSONUtil.toJsonStr(pictureEditRequest.getTags()));
        // 设置编辑时间
        picture.setEditTime(new Date());
        // 数据校验
        this.validPicture(picture);
        // 判断是否存在
        long id = pictureEditRequest.getId();
        Picture oldPicture = this.getById(id);
        ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
        // 校验权限
        //已经改为使用注解鉴权
//        checkPictureAuth(oldPicture,loginUser);
        // 补充审核参数
        this.fillReviewParams(picture, loginUser);
        // 操作数据库
        boolean result = this.updateById(picture);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    }

    /**
     * 根据颜色查询图片
     * @param spaceId
     * @param picColor
     * @param loginUser
     * @return
     */
    public List<PictureVO> searchPictureByColor(Long spaceId, String picColor, User loginUser) {
        //校验参数
        ThrowUtils.throwIf(spaceId == null || StrUtil.isBlank(picColor),ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null,ErrorCode.NO_AUTH_ERROR);
        //校验空间权限
        Space space = spaceService.getById(spaceId);
        ThrowUtils.throwIf(space == null,ErrorCode.NOT_FOUND_ERROR,"空间不存在");
        if(!loginUser.getId().equals(space.getUserId())){
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"没有空间权限");
        }
        //查询该空间所有图片(必需要有主色调)
        List<Picture> pictureList = this.lambdaQuery()
                .eq(Picture::getSpaceId, spaceId)
                .isNotNull(Picture::getPicColor)
                .list();
        //如果没有图片。返回空列表
        if (CollUtil.isEmpty(pictureList)){
            return Collections.emptyList();
        }
        //将目标颜色转换成color对象
        Color targetColor = Color.decode(picColor);
        //计算相似度并排序
            List<Picture> sortedPictures = pictureList.stream()
                    .sorted(Comparator.comparingDouble(picture -> {
                        // 提取图片主色调
                        String hexColor = picture.getPicColor();
                        // 没有主色调的图片放到最后
                        if (StrUtil.isBlank(hexColor)) {
                            return Double.MAX_VALUE;
                        }
                        Color pictureColor = Color.decode(hexColor);
                        // 越大越相似
                        return -ColorSimilarUtils.calculateSimilarity(targetColor, pictureColor);
                    }))
                    // 取前 12 个
                    .limit(12)
                    .collect(Collectors.toList());

            // 转换为 PictureVO
            return sortedPictures.stream()
                    .map(PictureVO::objToVo)
                    .collect(Collectors.toList());
    }


    /**
     * 批量编辑图片
     * @param pictureEditByBatchRequest
     * @param loginUser
     */
    @Transactional(rollbackFor = Exception.class)
    public void editPictureByBatch(PictureEditByBatchRequest pictureEditByBatchRequest, User loginUser) {
        List<Long> pictureIdList = pictureEditByBatchRequest.getPictureIdList();
        Long spaceId = pictureEditByBatchRequest.getSpaceId();
        String category = pictureEditByBatchRequest.getCategory();
        List<String> tags = pictureEditByBatchRequest.getTags();


        //校验参数
        ThrowUtils.throwIf( CollUtil.isEmpty(pictureIdList),ErrorCode.PARAMS_ERROR);
        ThrowUtils.throwIf(loginUser == null,ErrorCode.NO_AUTH_ERROR);
        //权限校验
        if (spaceId == null){
            //公共图片，仅管理员操作
            if (userService.isAdmin(loginUser)){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"没有权限");
            }
        }else {
            //私有空间，仅创建空间的人可以操作
            Space space = spaceService.getById(spaceId);
            ThrowUtils.throwIf(space == null,ErrorCode.NOT_FOUND_ERROR,"空间不存在");
            if(!loginUser.getId().equals(space.getUserId())){
                throw new BusinessException(ErrorCode.NO_AUTH_ERROR,"没有空间权限");
            }
        }
        //查询指定图片
        List<Picture> pictureList = this.lambdaQuery()
                .select(Picture::getId, Picture::getSpaceId)
                .eq(Picture::getSpaceId, spaceId)
                .in(Picture::getId, pictureIdList)
                .list();
        if (pictureList.isEmpty()) return;
        //更新分类和标签
        pictureList.forEach(picture -> {
            if (StrUtil.isNotBlank(category)){
                picture.setCategory(category);
            }
            if (CollUtil.isNotEmpty(tags)){
                picture.setTags(JSONUtil.toJsonStr(tags));
            }
        });
        // 批量重命名
        String nameRule = pictureEditByBatchRequest.getNameRule();
        fillPictureWithNameRule(pictureList, nameRule);
        //批量更新
        boolean result = this.updateBatchById(pictureList);
        ThrowUtils.throwIf(!result,ErrorCode.OPERATION_ERROR);
    }

    /**
     * 创建扩图任务
     * @param createPictureOutPaintingTaskRequest
     * @return
     */
    public CreateOutPaintingTaskResponse createPictureOutPaintingTask(
            CreatePictureOutPaintingTaskRequest createPictureOutPaintingTaskRequest,
            User loginUser) {
        //获取图片信息
        Long pictureId = createPictureOutPaintingTaskRequest.getPictureId();
        Picture picture = Optional.ofNullable(this.getById(pictureId))
                .orElseThrow(() -> new BusinessException(ErrorCode.NOT_FOUND_ERROR));
        //校验权限
        //已经改为使用注解鉴权
//        checkPictureAuth(picture,loginUser);
        //构造请求参数
        CreateOutPaintingTaskRequest taskRequest = new CreateOutPaintingTaskRequest();
        CreateOutPaintingTaskRequest.Input input = new CreateOutPaintingTaskRequest.Input();
        input.setImageUrl(picture.getUrl());
        taskRequest.setInput(input);
        taskRequest.setParameters(createPictureOutPaintingTaskRequest.getParameters());
        //创建任务
       return aliYunAiApi.createOutPaintingTask(taskRequest);
    }

    /**
     * nameRule 格式：图片{序号}
     *
     * @param pictureList
     * @param nameRule
     */
    private void fillPictureWithNameRule(List<Picture> pictureList, String nameRule) {
        if (CollUtil.isEmpty(pictureList) || StrUtil.isBlank(nameRule)) {
            return;
        }
        long count = 1;
        try {
            for (Picture picture : pictureList) {
                String pictureName = nameRule.replaceAll("\\{序号}", String.valueOf(count++));
                picture.setName(pictureName);
            }
        } catch (Exception e) {
            log.error("名称解析错误", e);
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "名称解析错误");
        }
    }

}




